Lock for loom weft detectors



W H KING LOOK FOR 1.00M WEFT DETECTORS Filed March 11. 1927 I .w an m m V.

Patented Dec. 20, 1927.

UNITED] STATES WILLIAM H. KING, or CLINTON, MASSACHUSETTS, Assmnon' TO: onourron a xnowrns Looivrwonxs, or woncnsrnn, massncnusmrsya oonrona'rron or MASSACHUSETTS.

LOCK r03 LOOM WEFT nnrnc'rons.

Application filed March11,1927. Serial No. 114,575.

This invention relates to weft detectors for looms, and it is the principal object of the invention to provide a lock to preventindication of weft exhaustion should the shuttle be misplaced.

In weft detectors of the type set forth in patent to Ryon No. 972,722 there are provided two detectors on a slide, one of the detectors having a penetrating point which is usually wedge-shaped and the other detector being pivoted to the slide and movable at weft exhaustion away from the wedge detector. A regularly moving actuator is attached to the magazine and is controlled as to its operation by a pin, the position of which is determined by the swinging detector. If the detector moves'forwardly without angular movement the pin is moved out of the path of the actuator but if'the detector swings on its pivot while the wedge detector is in engagement with the bobbin the pin is left in the path of the actuator to initiate replenishment.

When a shuttle is misplaced to such an extentthat the front wall thereof engages the wedge detector the slide is moved forwardly a suflicient distanceto move the pin from under the actuator lever even though the swinging detector moves angularly with respect to the slide, but I find that when the shuttle is in certain misplaced positions the swinging detector-will move but the slide will not be advanced sufliciently to carry the pin clear of the path of the actuator and as a result a premature indication of weft exhaustion is given. This action usually takes place when the shuttle is only slightly misplaced and that portion of the shuttle at the endlofthe' slot adjacent fthe'wedge detector engages the latter at the forward end thereof so that both detectors will be almost in contact with the bobbin when the slide is moved.

forwardly by the misplaced shuttle. Itis an important object of my present invention to extend the connector for the swinging detector so as to be engaged by a misplaced shuttle to positively withdraw the pin from under the "actuator and it is more specific object of the invention to accomplish this result without lost motion between the shuttle engaging member and the pin controlling connector. I

With these and other objects which will appear as the description proceeds, my

invention relatesto the'arrangements and combinations of parts hereinafterset forth, and more particularly pointed out .in the claims. 1 s

In the accompanying drawings, wherein a convenient embodiment of my invention is shown: 1

Fig 1 is a top plan view of the detector mechanism embodying my invention,*por-.

tions being removed to show the interior of the slide,

Fig.2 is an end elevation ofthe structure shown in Fig. 1, parts being removed for the sake of clearness,

Fig. 3 is a view similar to a portion of Fig. 1 but showing the detector giving a normal indication,

Fig. 4 is a view similar to Fig. 3 but show-' ing parts held against indication by the presence of sufficient weft,and Fig. 5 is a detailed vertical section on line 5-5 of Fig. 1. i.

7 Referring to the drawings, a stand 10 which, may be secured to the loom in any approved manner, has an upstanding arm 11 provided with a transverse slot 12 which receives an actuator lever 13 which as set forth in Patent No. 1,030,748, receives a downward movement on each detecting beat of the loom. A controller pin 14 normally lies under the actuator lever 13 and is pivotally connected at-the forward end thereof to an arm 15 secured to a rocking shaft 16 mounted in spaced bearings 17 formed on the stand 10. A collar 18 adjustably secured to the shaft 16 receives one end of'a torsion spring19, the other end of which extends into one of the bearings as at 20. The eflect of spring'19 is to hold the controller pin in the position shown in F ig. 1 under the actuator lever. The shaft 16has secured thereto another upstanding arm 21 by means of,

which the controller pin 14 may be moved.

' The detector proper comprises a slide 30 whichmoves in a bed 31 connected to the ward portion of the cap andthe clip 36, p

' serving normally to hold the slide yieldingly mally,projectsslightly beyond the roughenedsurface so as to penetrate a suflicient supply ofweft to permit said roughened surface to be engaged by the weft in the bobbin. The matter thusfar described may be substantially the same as set forth in the afore said patents, the detector 39 being similar also to the corresponding partset forth in patent to Ryon N 0. 1,352,536.

As previously stated my invention relates to means for locking the detector 39 to preventsuch angular movement thereof as accompanies indication of weft exhaustion when the shuttle is slightly misplaced. The shuttle S will ordinarily have a slot in its front wall of sufficient length to permit entry of the detectors 39 and 42, but it occasionally happens that the shuttle will be slightly misplaced so'that the portion of the wall indicated at 51 will be positioned. to engage a 4 portion of the ordinary wedge detector and permit swinging of member 39. to initiate replenishment. In carrying my improvements into effect I provide a single rod 60 formed substantially as shown in Fig. 1 and having the forward portion. thereof bentuto extend parallel'to the shaft 16 so as to be engaged by the upper portion of arm 21. A screw 62 in said rod is positioned to engage the forward portion of the bed 31. Said rod has engagement with the detector 39, the particular. form shown herein comprising a piece of sheet steel bent on itself as indicated at 63 and secured to said rod so that the spaced parallel free ends 64 thereof will definea socket for the ball end of arm 41. of the swinging detector. I project the rod 60 rearwardly as shown at 65 and form the same preferably witha bluntgend which projects to one side of the'wedge detector 42,

and terminates a short distance in front of the weft penetrating end of said wedge detector. 1 V I e In order to restrain undue lateral movement of the rod 60 in theslide 30, I rivet a lug to the slide, said lug projecting laterally from the slide to be engaged by some portion of the transfer mechanism (not shown) at, the time of transfer toywithdraw the detector from the pathof the incoming bobbin. The inner end 71 of said lug engages an offset portion 72 of the rod 60 said offset being free tojslide along the lug but being restrained againstsuch movement to ward the controller pin 14 as would cramp will remain at rest and the controller pin 14 will be positioned to interrupt downward movement of actuator lever 13 and thus initiate replenishment. The end 65 of the rod 60 is so placed that when the detector 39 swings to the position shown in Fig. 3 said end will not engage the bobbin, but will lie in advance of it so as not to interfere with theaction of the detector. 1 p I When the shuttleis slightly misplaced as indicated in Fig. 1, the wall of the shuttle will engage the rear extension 65 of the rod 60 and push said rod forwardly so that the same will move the. arm 21 and hence pin 14, to prevent indication; This action takes place immediately without lost motion and the force preventingthe indication is conveyed directly from the-shuttle forwardly to the lever- 21 .by a single member which is sufficiently rigid to withstand the blow. The roughened end '40 of detector 39, under these conditions, will be :heldtightly against thewedge detector42 and for this reason the slidewill move forwardly. When the feeler is tobe withdrawn at thetime of transfer the lug 70 will be moved forwardly'until, the de: tector 39 assumes the position shown in Fig. 3, after which continued forward movement of the lug will move the "rod 60 forwardly to withdraw the controller pin 14. from the path of the actuator lever 13. i

From the foregoing it..will be seen that'I have provided a very simple and durable lock for preventing indication of wetter haustion' when the. shuttle is slightly mi's placed and that said lock is formed as part of the operating mechanism which controls the swinging detector 39. It willifurther be seen that the lock operates immediately upon engagement with the misplacedshuttle with out lost motion. It will further be? seen that the length of the extension'65 is such that when the detector '39 swings to indicate weft exhaustion under normal conditions, said lock will still be somewhat in advance of the yarn penetrating end .of the wedge detector 42.

Having thus described my invention it will be apparent that changes and modifications'may be made therein by those skilled in thefart without departing from the spirit and scope of the invention, and I do not wish to be limited to the details herein disclosed but what I claim is: p

1. In weft detecting mechanism for a loom having a shuttle, a loom controller, a support, a slide movable on the support, an angularly movable detector pivoted to the slide, a rod carried by the slide and operatively connected to the angularly movable detector, said rod having an end extending rearwardly to be engaged by a misplaced shuttle, and a single spring to hold the controller yieldingly in operative position to effect change in the operation of the loom and also to hold the rod in rearwardposition with the rear end thereof in a position to engage the misplaced shuttle, forward movement of the rod by a misplaced shuttle being effective to move the controller out of loom controlling position.

2. In weft detecting mechanism for a loom having a shuttle, a loom controller, actuator to cooperate with the controller, a sliding carrier, an angularly'movable detector pivotally mounted on the carrier, 3. longitudinally movable member on the carrier hav ing operative contact with the angularly movable detector member, said longitudi nally movable member havin the rear end thereof extended toward the s huttle and beyond the carrier to be engaged by the misplaced shuttle, means to operatively connect the longitudinally movable memberand the controller so that forward movement of the longitudinally movable member by a mis-e placed shuttle will move the controller out of loom controlling position, and a single;

WILLIAM H. KING. 

